I've owned four Pentax bodies over the years (one was stolen) and have never had an instance of needing to align the focus screen and film plane. However, I do have a grid screen I've never taken the effort to personally exchange, so now I know how to do that.
Hello! Great video, thanks for all the tips. I have one issue tho. When I'm putting the grooves up from the fresnel and the hole on the matte groundglass upwards, I can't adjust the groundglass to reach infinity. It stops way earlier. Is it really suppose to face up? I find if I turn them around I can achieve infinity from the ground glass adjustments. Thanks!
@@yorgic I did, but I might have to try and do it again and see if I can find something further away. My matte ground glass doesn’t have any grooves. Should the matte side be up or down?
When you're adjusting the calibration of the focus screen it's not clear in your demo if you are you using infinity focus to check the alignment or in your video it looks more like the focus is on the roof. What do you use? Infinity or some object closer around 3m ? Most of my work is portrait and hence all around minimum focus and I am regularly back focusing so that the ears and not the ears are in sharp focus! Aggghh SO frustrating so would be super grateful if you can help me nail this. 🙏
im kind of confused on minute 1:26 , it says while focusing on infinity to loosen the 2 screws? then in the next shot, your focus is on close distance and then u focus to infinity. so should I focus to infinity first? then loosen the screws? or should I focus close distance, loosen screws then focus to infinity? thanks again!
I had my focus screen changed recently and feel like my focus is off just a little bit, do u think I should try to do this to my lens? I have the latest 105mm
@@yorgic I think it was I had no problem with my 90mm before the change and after the change I feel like it’s been off. But I also shoot at 2.4 most of the time so maybe user error ? Should I start with the camera focus plane or lense focus plane ?
Thank you for this thorough, easy to follow video!!!
I've owned four Pentax bodies over the years (one was stolen) and have never had an instance of needing to align the focus screen and film plane. However, I do have a grid screen I've never taken the effort to personally exchange, so now I know how to do that.
Very helpful - especially 2dn part ... just in case I want to exchange my focussing screens one day
Very nice!!❤
Thanks! Very useful.
Hello! Great video, thanks for all the tips. I have one issue tho. When I'm putting the grooves up from the fresnel and the hole on the matte groundglass upwards, I can't adjust the groundglass to reach infinity. It stops way earlier. Is it really suppose to face up? I find if I turn them around I can achieve infinity from the ground glass adjustments. Thanks!
Hello, in the video the focusing screens are installed following the pentax 67 service manual. Is your lens calibrated with the film plane?
@@yorgic I did, but I might have to try and do it again and see if I can find something further away. My matte ground glass doesn’t have any grooves. Should the matte side be up or down?
Thanks for sharing this, very helpful. Where can I get an acrylic sheet that size?
It's 2mm acrylic with one side sanded. You have to cut it from a bigger sheet.
When you're adjusting the calibration of the focus screen it's not clear in your demo if you are you using infinity focus to check the alignment or in your video it looks more like the focus is on the roof. What do you use? Infinity or some object closer around 3m ? Most of my work is portrait and hence all around minimum focus and I am regularly back focusing so that the ears and not the ears are in sharp focus! Aggghh SO frustrating so would be super grateful if you can help me nail this. 🙏
Sorry correction: Ears not eyes in focus!
In this video the calibration is always on infinity focus.
Hi ... can't you do ground glass adjustment without first test?
Yes, if you know for sure that the lens is well calibrated.
@@yorgic I sent an email
im kind of confused on minute 1:26 , it says while focusing on infinity to loosen the 2 screws? then in the next shot, your focus is on close distance and then u focus to infinity. so should I focus to infinity first? then loosen the screws? or should I focus close distance, loosen screws then focus to infinity? thanks again!
When you losen the screws the focusing ring moves freely without changing the focus.
I had my focus screen changed recently and feel like my focus is off just a little bit, do u think I should try to do this to my lens? I have the latest 105mm
If the focus was right before the change, probably not. However you can check the film plane to be sure.
@@yorgic I think it was I had no problem with my 90mm before the change and after the change I feel like it’s been off. But I also shoot at 2.4 most of the time so maybe user error ? Should I start with the camera focus plane or lense focus plane ?
The video order